assertEquals(0, qrList.size());

        assertFalse(qrList.addAll(0, new ArrayList<>()));
        assertEquals(0, qrList.size());
    }

    public void test_listOperations_removeAllEmpty() {
        List<Map<String, Object>> documentList = new ArrayList<>();
        Map<String, Object> doc = new HashMap<>();
        doc.put("title", "Test");
        documentList.add(doc);